In a narrow channel, a signal of intent which must be answered by the other vessel, is sounded by a vessel（）.<br>A:meeting another head-on<br>B:crossing the course of another<br>C:overtaking another<br>D:Any of the above

In a narrow channel, a signal of intent which must be answered by the other vessel, is sounded by a vessel（）.
A:meeting another head-on
B:crossing the course of another
C:overtaking another
D:Any of the above

出自：海船船员证

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